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丙烯酸型高吸水性树脂的制备及研究进展 总被引:3,自引:0,他引:3
阐述了丙烯酸型高吸水性树脂的吸水机理、分类及制备方法,介绍了吸水性树脂国内外研究开发状况,并分别介绍了本体聚合法、反向悬浮聚合法、水溶液聚合法等,同时对几种合成方法的优缺点进行了评述和比较,在此基础上指出高吸水性树脂的研究及发展方向。 相似文献
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制备SLs-AA型高吸水性树脂,研究了外部溶液中离子种类与浓度及不同pH值的溶液对该树脂吸水倍率的影响,分析不同粒径吸水性该树脂的吸水倍率随时间的变化和该树脂在土壤中的抑制蒸发情况,并在分析过程中讨论SLs-AA型高吸水性树脂吸水机理。 相似文献
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介绍了高吸水性树脂的吸水机理,综述了近年来国内外采用前期聚合法和后期表面交联法提高高吸水性树脂加压吸收量的研究进展。前期聚合法涉及设计结构法、交联剂法和共混复合法;后期表面交联法涉及的交联剂主要有多元醇、多价金属盐、环氧化合物以及混合交联剂。最后指出了目前提高高吸水性树脂加压吸收量的方法存在的不足以及今后的发展方向。 相似文献
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聚丙烯酸钠/高岭土复合高吸水性树脂的制备、结构与性能 总被引:4,自引:0,他引:4
以丙烯酸和高岭土为原料,用反相悬浮聚合法合成了聚丙烯酸钠/高岭土复合高吸水性树脂。研究了加入高岭土的聚丙烯酸钠复合高吸水性树脂合成中反应温度、中和度、交联剂用量、引发剂用量、高岭土添加量等影响树脂吸水性能的主要因素。结果表明,用反相悬浮聚合法合成的复合高吸水性树脂后处理容易,树脂的吸水率达到512g/g,吸盐水率达到81g/g,吸水速度比不加高岭土提高20%,保水能力提高15%,在250℃加热30min仍能保持原吸水率的95%。用IR和TEM研究了复合高吸水性树脂的表面和结构,TEM显示高岭土的加入对树脂颗粒大小和形状有较大的影响,IR初步表明聚丙烯酸与高岭土产生了交联。 相似文献
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高吸水性树脂的特性,合成方法及应用 总被引:3,自引:0,他引:3
本文主要叙述了高吸水性树脂的开发历史和现状,高吸水性树脂的作用机理和吸水方式,高吸水性树脂的种类,合成方法,特性,高吸水性树脂最近的开发方向;高吸水性树脂的应用发展。 相似文献
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高吸水性树脂是一种新型多功能高分子材料,由于其具有独特的吸水保水性能,高吸水树脂在农林园艺、卫生用品、沙漠绿化及建筑等多个领域具有广泛的应用。传统的高吸水树脂主要由有机分子直接合成,这类树脂虽然吸水率高,但具有耐盐性差、吸水凝胶强度低和合成成本高等缺点,通过加入无机矿物质可大大提高树脂的性能。本文采用溶液聚合的方法,以N,N′-亚甲基双丙烯酰胺作为交联剂,过硫酸铵为引发剂,丙烯酸、丙烯酰胺为反应单体,制备出复合高吸水性树脂。研究了高岭土添加量,丙烯酰胺用量,交联剂用量,引发剂用量对树脂的吸水率的影响,同时还考察了保水性能,并对复合高吸水性树脂进行了红外表征。 相似文献
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Wenying Zhou Shuhua Qi Tao Ai Hongzhen Zhao Mingtao Zhang Wenquan Li Eva Lau 《应用聚合物科学杂志》2009,111(1):255-263
A toughened epoxy resin matrix was obtained with a reactive toughening agent and methyl hexahydrophthalic anhydride as a curing agent. The mechanical properties of the modified epoxy resin and its glass‐fiber‐reinforced composites were investigated systematically. The modified epoxy resin matrix possessed many good properties, including a high flexural strength (138 MPa), high elongation at break (5.2%), low viscosity, long pot life at room temperature, and good water resistance. In addition, the glass‐fiber‐reinforced composites showed a high strength conversion ratio of the glass fiber (86.7%) and good fatigue resistance. The results demonstrated that the modified epoxy resin matrix is very suitable for applications in reverse osmosis membrane shell products fabricated with wet filament winding for water treatment. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
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本文详解了离子交换树脂在纯水制备方面的应用。阐述了用离子交换树脂生产超纯水、高纯水的工艺流程及其特点,综述了离子交换树脂在纯水制备方面的应用现状。 相似文献
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Shujun Zhao Zhong Wang Huiwen Pang Zhi Li Wei Zhang Shifeng Zhang Jianzhang Li Li Li 《大分子材料与工程》2020,305(2)
Plant protein, as a sustainable alternative to petroleum‐derived resin, has exhibited notable potential for engineering wood products without formaldehyde emission, while the poor mechanical and water‐resistant performances limit its practical applications. Inspired by mussel chemistry and structure, a dopamine‐functionalized polyurethane (D‐PU) elastomer is synthesized in this work acting as a bio‐inspired crosslinking unit to improve the properties of soy protein (SP) resin. It is found that the catechol groups of the incorporated D‐PU not only triggers polyurethane to interact with SP matrix giving rise to a stable crosslinking network with excellent load‐bearing capacity, but also serves as a water‐resistant barrier to reduce the water erosion effect on resin. Moreover, a desired microphase‐separated morphology is observed within the continuous protein phase after introducing D‐PU. The microphase‐separated structure simultaneously strengthens and toughens SP adhesive layer, thus achieving high‐efficiency stress transfer and energy dissipation as well as accelerating SP to further permeate into the substrate forming more mechanical adhesion nails. As a result, the modified SP‐D‐PU resin presents an impressive improvement in dry and wet adhesion strength up to 70.5% and 133.9% compared to the pristine SP resin, respectively. The proposed biomimetic design may offer a workable strategy for preparing of high‐performance bio‐based composites. 相似文献